#include <iostream>
#include <string>
#include <pthread.h>
#include <unistd.h>

const int num = 5;
pthread_mutex_t gmutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t gcond = PTHREAD_COND_INITIALIZER;

void* Wait(void* args)
{
    std::string name = static_cast<const char*>(args);
    while(true)
    {
        pthread_mutex_lock(&gmutex);
        
        pthread_cond_wait(&gcond,&gmutex);
        usleep(10000);
        std::cout << "I am " << name << std::endl;

        pthread_mutex_unlock(&gmutex);
    }
}

int main()
{
    // 1.创建保存线程tid的数组
    pthread_t threads[num];
    for(int i=0;i<num;i++)
    {
        char* name = new char[1024];
        snprintf(name,1024,"thread-%d",i + 1);
        pthread_create(threads + i,nullptr,Wait,(void*)name);
        usleep(1000);
    }
    sleep(1);
    // 2.唤醒其他线程
    while(true)
    {
        pthread_cond_signal(&gcond); // 唤醒一个线程
        // pthread_cond_broadcast(&gcond); // 唤醒所有线程
        std::cout << "唤醒一个线程..." << std::endl;
        sleep(2);
    }
    // 3.终止线程
    for(int i=0;i<num;i++)
    {
        pthread_join(threads[i],nullptr);
    }
    return 0;
}